Xargoroth Eldritch Horror

Trample, Islandwalk, Eminence;
At the beginning of your upkeep or whenever a creature with mana value 6 or greater is put into
your graveyard you may instead exile
it with X Ice counters on it where X
is it's mana value. Whenever you or
an opponent casts a spell remove
X Ice counters from among any number of exiled creatures where X is that spells mana value.
When the last ice counter is removed from an exiled creature put that creature onto the battlefield